Siemens QSA2700D Operator's manual

QSA2700D / QSA2700 / AQS2700
Fine Dust Room Sensor
Basic Documentation
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Building Technologies
2017-12-01 Building Technologies

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Table of Contents
1About this document............................................................................. 3
2Product overview ................................................................................. 5
3Installation........................................................................................... 8
4Configurations ....................................................................................12
5Technical data ....................................................................................17
6 Maintenance.......................................................................................19
7 Air Quality Index classes......................................................................22
8Standard compliance...........................................................................23
9Appendices ........................................................................................24

About this document
Revision history
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1About this document
1.1 Revision history
Edition Date Changes Section Pages
1August. 2017 First version. All
1.2 Reference documents
Ref. Document title Document number
1Mounting instructions A6V11160930
2 Datasheet A6V11160938
You can download the above documents at http://siemens.com/bt/download:
Simply search by document numbers.
1.3 Before you start
This document may be duplicated and distributed only with the expressed
permission of Siemens Ltd.
These documents were prepared with great care.
●The content of all documents is checked at regular intervals.
●All necessary corrections are included in subsequent versions.
●Documents are automatically amended as a consequence of modifications and
corrections to the products described.
Please make sure that you are aware of the latest document revision date.
If you find any lack of clarity while using this document, or if you have any criticisms
or suggestions, please contact your local point of contact (POC) at the nearest
branch office. Addresses for Siemens RCs are available at www.siemens.com/sbt.
Markups
Special markups are indicated in the document as follows:
●Numbered lists and instructions with an operation sequence
1.
2.
Procedures must be performed in the specified order.
[➙ X] Reference to a page number
Symbol identifications
WARNING
This is the symbol for hazard. It warns you of
Risks of injury.
Comply with all
measures designated by this symbol to prevent injury or death.
Copyright
Quality assurance
Conventions for text
marking

About this document
Before you start
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NOTICE
This symbol
identifies an important notice that you should be aware of when you
are using the product.
Before using products from Siemens Industry, Inc., it is important that you read the
documents supplied with or ordered at the same time as the products (equipment,
applications, tools, and so on) carefully and in full.
Before you get started, make sure you have an internet connection, a valid Email
address and a smartphone in hand.
Additional information on products and applications is available:
●From your Siemens branch office www.siemens.com/sbt or at your system
suppliers.
●From the support team at headquarters [e-mail]
if no local POC is available.
Siemens assumes no liability to the extent allowed under the law for any losses
resulting from a failure to comply with the aforementioned points or for the
improper compliance of the same.
Document use/ request to
the reader

Product overview
Type summary
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2Product overview
The fine dust room sensor is designed to measure and transmit indoor
concentrations of PM2.5 and PM10. This wall-mounted product has variants with or
without displays and can connect directly to Siemens BT controllers as well as
many third party controllers via voltage output or Modbus.
2.1 Type summary
Type Order number Description Display
QSA2700 S55720-S457 Room sensor for detection
of PM2.5 and PM10
3-color LED service indication
QSA2700D S55720-S458 Room sensor with LCD
display for detection of
PM2.5 and PM10
2.4-inch color LCD screen for
PM2.5 values, Air Quality Index,
and service
AQS2700 S55720-S459 Sensor module for
replacement
2.2 Contents of QSA2700D and QSA2700
Items Quantity
Fine dust sensor 1
Plastic mounting plate 1
Screws 2 pcs
Mounting instructions 1
2.3 Features
The fine dust room sensor is designed to measure and transmit indoor
concentrations of PM2.5 and PM10.
●0…10 V and Modbus output
●Configurable Modbus parameters
●Plug&play configuration for Siemens ClimatixTM controller
●QSA2700:
– 3-color LED indication for service needs
●QSA2700D:
– 2.4-inch color LCD screen for PM2.5 values and AQI indication
–Energy efficient mode: The screen is off if no one is in front of the sensor
(within 1 m for several minutes)
–Micro USB DC 5V for display
–4 selectable languages: English, Chinese (default), German, French
–3 selectable Air Quality Index classes

Product overview
Device overview
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2.4 Device overview
1Hole for wiring (top) for surface mounting
2 [QSA2700 only]LED
3 [QSA2700D only]LCD display
4(power supply for display only)
5 [QSA2700D only]Proximity sensor
6Push button
7Hole for wiring (bottom) for surface mounting
8Hole for attaching the mounting plate to the housing
9Air outlet
10 Air inlet

Product overview
Normal display overview of QSA2700D
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2.5 Normal display overview of QSA2700D
1Current Air Quality Index (refer to Air Quality Index classes [➙22] for more information)
2Text on the current Air Quality Index

Installation
Mounting requirements
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3Installation
3.1 Mounting requirements
●The sensor is suitable for conduit box mounting, dry wall mounting (with
mounting hole for wires concealed) and surface mounting.
●The recommended height is 1.2-1.5 m above the floor, especially for type with
display.
●Do not mount the sensor in recesses, shelves, behind curtains or doors, or
above heat sources.
●Avoid direct solar radiation.
●Seal the conduit box or the installation tube if any, as air currents can affect
sensor readings.
●Make sure ambient conditions are within 0…50 °C and 5...95% r.h. (no
condensation).
●Do not mount device in places full of oil smog, e.g. in a kitchen.
●Peel off the protective film on air inlet and air outlet before using the device.
●The air inlet and outlet must be free of any blockage, particularly the floc type
of dirt.
NOTICE
High concentrations of cigarette/oil smog in, for example, smoking rooms, may
affect the optical components inside the sensors. We highly recommend replacing
the sensor module at the latest annually in such environments.
NOTICE
Ultrasonic humidifiers can create fine dust from unpurified water that can distort
sensor readings. Do not use in spaces with PM2.5 controlled ventilation.
Mounting position

Installation
Wiring
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●Wire stripper
●Screw driver
●Pencil, level & drill (for dry wall mounting and surface mounting only)
Wires for Specifications
Power supply 0.4 to 1.5 mm2
Analog output 0.4 to 1.5 mm2
Modbus output Twisted pair 0.4 to 1.5 mm2
Length <600m
3.2 Wiring
G, G0: Operating voltage AC 24 V (SELV) / DC13.5…35
V
U1: Signal output DC 0...10 V for PM2.5 0...500 μg/m3
U2: Signal output DC 0...10 V for PM10 0...500 μg/m3
Gu: Signal ground for U1 & U2
+,-, Ref: Modbus signal
Mounting dimensions
Mounting tools
Wire specification

Installation
Installation
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3.3 Installation
1. Separate the housing from the mounting plate using a screw driver.
2. Screw and fix the mounting plate on a conduit box (Conduit box mounting), or
on a wall (Dry wall mounting if there is a mounting hole and the wires are
concealed in the hole; Surface mounting if there is no mounting hole).